Abstract
Minimizing the surface roughness is one of the primary objectives in most of the machining operations in general and in internal turning in particular. Poor control on the cutting parameters due to long boring bar generates non conforming parts which results in increase in cost and loss of productivity due to rework or scrap. In this study, the Taguchi method is used to minimize the surface roughness by investigating the rake angle effect on surface roughness in boring performed on a CNC lathe. The control parameters included besides tool rake angle were insert nose radius, cutting speed, depth of cut, and feedrate. Slight tool wear was included as a noise factor. Based on Taguchi Orthogonal Array L18, a series of experiments were designed and performed on AISI 1018 steel. Analysis of variance, ANOVA, was employed to identify the significant factors affecting the surface roughness and S/N ratio was used to find the optimal cutting combination of the parameters. It was concluded that tool with a high positive rake angle and smaller insert nose radius produced lower surface roughness value in an internal turning operation. It was also concluded that high feedrate and low cutting speed has produced the lowest surface roughness.
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Abbreviations
- Ra,n :
-
Surface roughness with new insert
- Ra,u :
-
Surface roughness with slightly used insert
- ηn :
-
Signal to Noise ratio of Ra,n
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Munawar, M., Chen, J.CS. & Mufti, N.A. Investigation of cutting parameters effect for minimization of sur face roughness in internal turning. Int. J. Precis. Eng. Manuf. 12, 121–127 (2011). https://doi.org/10.1007/s12541-011-0015-x
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DOI: https://doi.org/10.1007/s12541-011-0015-x